let the user override some DNS records

setup/management.sh

@@ -2,7 +2,8 @@
 
 source setup/functions.sh
 
-apt_install python3-flask links duplicity
+apt_install python3-flask links duplicity libyaml-dev
+pip3 install rtyaml
 
 # Create a backup directory and a random key for encrypting backups.
 mkdir -p $STORAGE_ROOT/backup

setup/system.sh

@@ -7,7 +7,7 @@ apt-get -qq -y upgrade
 
 # Install basic utilities.
 
-apt_install python3 wget curl bind9-host
+apt_install python3 python3-pip wget curl bind9-host
 
 # Turn on basic services:
 #
@@ -29,4 +29,4 @@ if [ -z "$DISABLE_FIREWALL" ]; then
 	apt_install ufw
 	ufw_allow ssh;
 	ufw --force enable;
-fi
+fi